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102x85怎么便算

102×85 =100×85+2×85 =8500+170 =8670

102*85 = 8670 验算:8670÷102=85 或者:8670÷85=102

.1642-237-63 =1642-(237+63) =1642-300 =1342 25*35*4*2 =(25*4)*(35*2) =200*70 =14000 102*85 =85*(100+2) =85*100+85*2 =8500+170 =8670

(-2x)²=4x²

102x0.85 =100x0.85+2x0.85 =85+1.7 =86.7

102X85 =100×85+2×85 =8500+170 =8670 99Xl76 =100×176-176 =17600-176 =17424 16XI25X25 =8×125×2×25 =1000×50 =50000 5600÷16÷5 =5600÷(16×5) =5600÷80 =70

x+2x-14=85 解: x+2x=85+14 3x=99 x=33

9.27×0.4×12.5×2 =9.27×(0.4×12.5×2) =9.27×10 =92.7

0.4×125×25×0.8 =(0.4×25)×(125×0.8) =10×100=1000 1.25×(8+10) =1.25×8+1.25×10 =10+12.5=22.5 9123-(123+8.8) =9123-123-8.8 =9000-8.8 =8991.2 1.24×8.3+8.3×1.76 =8.3×(1.24+1.76) =8.3×3=24.9 9999×1001 =9999×(1000+1) =9999×10...

我看到这个问题太晚了

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